LookAtMe

Little eyes sit on the menu bar and follow YOUR movements (not your mouse pointer!). They will follow anything that moves in front of the camera.

They will also react to bright light or darkness. As it analyzes movement using video input, this software requires a camera equipped mac.
What's new in this version:
Fixed Bug where preferences window could get lost. Fixed Bug where Pupil Style was not saved in user defaults. Improved Cat-Style Pupils. Motion tracking uses RGB instead of grayscale, should be more accurate. Aded Iris. Colors accept alpha values now. Added softening shadows.